Q.
A ball hits the floor and rebounds after inelastic collision. In this case
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a
The momentum of the ball just after the collision is the same as that just before the collision
b
The mechanical energy of the ball remains the same in the collision
c
The total momentum of the ball and the earth is conserved
d
The total energy of the ball and the earth is conserved
answer is C.
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Detailed Solution
By the conservation of momentum in the absence of external force total momentum of the system (ball + earth) remains constant.
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